To illustrate the advance made by Herschel, the picture compares the SPIRE image with the best previous image of this galaxy in this part of the spectrum, made by NASA's Spitzer space observatory at a wavelength of 160 microns. The huge difference in image quality is attributable to the much larger Herschel telescope (3.5 m compared to Spitzer's 85 cm) and to SPIRE's highly sensitive detectors.